1. Microsoft Office Communications Server 2007 R2 Attendant Hotfix KB 980936
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=36beb56d-072e-4a92-b781-a1e8a548a5ac

    Issue that this update package fixes

• 981416 (http://support.microsoft.com/kb/981416/ ) Office Communicator 2007 R2 audio becomes choppy during attendant console calls or Public Switched Telephone Network calls

2. Microsoft Office Communicator 2007 R2 Hotfix KB 976135
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=515d6dba-4c6a-48bb-a06a-d99c5742676d

    Issues that this hotfix package fixes

• 978161 (http://support.microsoft.com/kb/978161/ ) Office Communicator 2007 R2 crashes when you receive an incoming instant message notification

• 978162 (http://support.microsoft.com/kb/978162/ ) A hyperlink is converted to plain text format when you input the hyperlink into an Office Communicator 2007 R2 conversation window

• 978163 (http://support.microsoft.com/kb/978163/ ) You cannot call a user by using the Actions button in Office Outlook 2007, but you can call the user through Office Communicator 2007 R2

• 978639 (http://support.microsoft.com/kb/978639/ ) The shortcut menu is not displayed or Office Communicator 2007 R2 crashes when you right-click a contact

• 978715 (http://support.microsoft.com/kb/978715/ ) A wireless connection is reported incorrectly as a wired connection in a QoE report incorrectly when you make an Office Communications 2007 R2 call in Windows XP

• 978716 (http://support.microsoft.com/kb/978716/ ) Communicator 2007 R2 users experience network bandwidth issues

• 978717 (http://support.microsoft.com/kb/978717/ ) Send listening MOS and receive listening MOS are low for Communicator 2007 R2 calls

• 978718 (http://support.microsoft.com/kb/978718/ ) Connectivity checks fail if you use Office Communicator 2007 R2 together with a third-party implementation of MS-ICE 2.0

• 978719 (http://support.microsoft.com/kb/978719/ ) CPU usage increases significantly when you make a call in Office Communicator 2007 R2

• 978720 (http://support.microsoft.com/kb/978720/ ) Office Communicator 2007 R2 crashes when you move a contact to a specific group

3. Office Communicator Phone Edition (2007 R2)
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=565595be-6cf3-4a61-a1e4-12555749ca64

    Issues that this update package fixes:

• Tanjay unlocks when you sign in on Fuze or Outlook Web Access (OWA).
• You cannot call a number on Tanjay when the number maps to a blocked Outlook contact without any instant messaging (IM) address. This issue does not occur on Microsoft Office Communicator.
• After some regions change their rules for daylight saving time, a phone that uses Microsoft Office Communicator 2007 R2, Phone Edition is one hour off.

4. Microsoft Office Communications Server 2007 R2 Hotfix KB 968802
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=b3b02475-150c-41fa-844a-c10a517040f4

See this article for components updated
http://support.microsoft.com/?kbid=968802